Audible prayer can never do the works of spiritual understanding, which regenerates; but silent prayer, watchfulness, and devout obedience enable us to follow Jesus’ example. ... Audible prayer is impressive; it gives momentary solemnity and elevation to thought. But does it produce any lasting benefit? Looking deeply into these things, we find that “a zeal...not according to knowledge” gives occasion for reaction unfavorable to spiritual grown, sober resolve, and wholesome perception of God’s requirements. The motives for verbal prayer may embrace too much love of applause to induce or encourage Christian sentiment.
Mary Baker Eddy, Science and Health with Key to the Scriptures, pp.4, 7
Mary Baker Eddy obviously had a problem with audible prayer. However, how does this teaching compare with the myriads of examples, even by Jesus, of audible prayer!?! This teaching is unbiblical.